/*
  ==============================================================================

   This file is part of the juce_core module of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.

   Permission to use, copy, modify, and/or distribute this software for any purpose with
   or without fee is hereby granted, provided that the above copyright notice and this
   permission notice appear in all copies.

   THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
   TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN
   NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
   DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
   IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ------------------------------------------------------------------------------

   NOTE! This permissive ISC license applies ONLY to files within the juce_core module!
   All other JUCE modules are covered by a dual GPL/commercial license, so if you are
   using any other modules, be sure to check that you also comply with their license.

   For more details, visit www.juce.com

  ==============================================================================
*/

IPAddress::IPAddress() noexcept
{
    address[0] = 0;  address[1] = 0;
    address[2] = 0;  address[3] = 0;
}

IPAddress::IPAddress (const uint8 bytes[4]) noexcept
{
    address[0] = bytes[0];  address[1] = bytes[1];
    address[2] = bytes[2];  address[3] = bytes[3];
}

IPAddress::IPAddress (uint8 a0, uint8 a1, uint8 a2, uint8 a3) noexcept
{
    address[0] = a0;  address[1] = a1;
    address[2] = a2;  address[3] = a3;
}

IPAddress::IPAddress (uint32 n) noexcept
{
    address[0] = (n >> 24);
    address[1] = (n >> 16) & 255;
    address[2] = (n >> 8)  & 255;
    address[3] = (n & 255);
}

IPAddress::IPAddress (const String& adr)
{
    StringArray tokens;
    tokens.addTokens (adr, ".", String());

    for (int i = 0; i < 4; ++i)
        address[i] = (uint8) tokens[i].getIntValue();
}

String IPAddress::toString() const
{
    String s ((int) address[0]);

    for (int i = 1; i < 4; ++i)
        s << '.' << (int) address[i];

    return s;
}

IPAddress IPAddress::any() noexcept           { return IPAddress(); }
IPAddress IPAddress::broadcast() noexcept     { return IPAddress (255, 255, 255, 255); }
IPAddress IPAddress::local() noexcept         { return IPAddress (127, 0, 0, 1); }

bool IPAddress::operator== (const IPAddress& other) const noexcept
{
    return address[0] == other.address[0]
        && address[1] == other.address[1]
        && address[2] == other.address[2]
        && address[3] == other.address[3];
}

bool IPAddress::operator!= (const IPAddress& other) const noexcept
{
    return ! operator== (other);
}

#if ! JUCE_WINDOWS
static void addAddress (const sockaddr_in* addr_in, Array<IPAddress>& result)
{
    in_addr_t addr = addr_in->sin_addr.s_addr;

    if (addr != INADDR_NONE)
        result.addIfNotAlreadyThere (IPAddress (ntohl (addr)));
}

static void findIPAddresses (int sock, Array<IPAddress>& result)
{
    ifconf cfg;
    HeapBlock<char> buffer;
    int bufferSize = 1024;

    do
    {
        bufferSize *= 2;
        buffer.calloc ((size_t) bufferSize);

        cfg.ifc_len = bufferSize;
        cfg.ifc_buf = buffer;

        if (ioctl (sock, SIOCGIFCONF, &cfg) < 0 && errno != EINVAL)
            return;

    } while (bufferSize < cfg.ifc_len + 2 * (int) (IFNAMSIZ + sizeof (struct sockaddr_in6)));

   #if JUCE_MAC || JUCE_IOS
    while (cfg.ifc_len >= (int) (IFNAMSIZ + sizeof (struct sockaddr_in)))
    {
        if (cfg.ifc_req->ifr_addr.sa_family == AF_INET) // Skip non-internet addresses
            addAddress ((const sockaddr_in*) &cfg.ifc_req->ifr_addr, result);

        cfg.ifc_len -= IFNAMSIZ + cfg.ifc_req->ifr_addr.sa_len;
        cfg.ifc_buf += IFNAMSIZ + cfg.ifc_req->ifr_addr.sa_len;
    }
   #else
    for (size_t i = 0; i < (size_t) cfg.ifc_len / (size_t) sizeof (struct ifreq); ++i)
    {
        const ifreq& item = cfg.ifc_req[i];

        if (item.ifr_addr.sa_family == AF_INET)
            addAddress ((const sockaddr_in*) &item.ifr_addr, result);
    }
   #endif
}

void IPAddress::findAllAddresses (Array<IPAddress>& result)
{
    const int sock = socket (AF_INET, SOCK_DGRAM, 0); // a dummy socket to execute the IO control

    if (sock >= 0)
    {
        findIPAddresses (sock, result);
        ::close (sock);
    }
}
#endif
